Abd Alkareem Abo Al-Kheer^*(1)    

(1). Rural Engineering Department, Faculty of Agronomy, Aleppo University, Syria.

(*Corresponding author: Dr. Abd Alkareem Abo Al-Kheer. E-mail: a.aboalkheer@hotmail.com).

Received: 14/05/2018                                Accepted: 29/09/2018

Abstract

In this research, three models based on analytical approach were used for calculating tillage forces. The first model was based on Soehne’s approach, with some modifications to incorporate the adhesion force, the inertia force and the effects of the side crescents. The second model was based on Mckyes-Ali approach, the adhesion force and the inertia force were integrated to this model, and the failure angle was determined according the passive earth pressure theory. The third model was based on the findings of Perumpral and Swich, which were established on the Perumpral et al. model. The comparison between calculated and measured values showed that the performance of each model depended on tillage system parameters. In general, the performance of the second model was better than the first and the third models. In this work, the Multimodel Ensemble Prediction Method (MEPM) was applied, based on the precedent analytical models, and the calculated values were compared to measured ones. It was noted that the performance of the MEPM was better than all of three models.

Keywords: Tillage forces, Tillage tool, Soil failure, Tillage system parameters.

Full Paper in Arabic: PDF